1980-1981 apple//+ "temple of Apahai" (spelling?).
Later, when PC software began really outnumbering apple / trs (TSR?) 80 / commodore platforms, played "Wizardry" - still remember clearing the dungeon down to level 4, and opening the door to the "Monster Allocation Center." Tsunami anyone?
And the Bishop bug/exploit... bishop was a dual classed character that had some cleric and some mage skills. occasionally, if the bishop character successfully identified an 'unknown' item, massive amounts of experience would be awarded - like 10+ levels worth. Then it was on to Lord British...